Heat regulator for gas stoves



s. s. BAKER 1 ,875,548

S STOVES Sept. 6, 1932.

HEAT REGULATOR FOR GA 1, 1951 2 Sheets-Sheet 1 Filed Aug. 2

Sept. 6, 1932. s. s. BAKER 1,875,548

HEAT REGULATOR FOR GAS STOVES 2 Sheets-Sheet 2 Filed Aug. 21. 1951Inventor BAKER Att'y.

Patented Se t: 6, 1932 PATsNT. OFFICE OF WEBSTER GROVES, MISSOURI smear.a. sane,

HEAT REGULATOR FOB GAQ STOVES Application fled August 21,1931. sum 1%.558,432.

My invention relates to improvements in gas stoves and particularly heatregulators therefor and their relation to other parts of the stovestructure.

In present day gasstoves or ranges, commercially known as the table topor console type, the open burners are arranged to lie in substantiallythe same horizontal plane as the top part, of the adjacent oven and theentire top of the stove is capable of being enclosed by a suitableornamental cover when t e stove is not in use. In .gas stoves of thistype, it has been the custom to hermostatically controlled valve orregulating the heat of the oven at the oven en of the stove in alignmentwith the thermostat in the oven, due to the fact that the hot topportion completely covers the side of the oven adjacent thereto. Thistype of installation has the disadvantage that the regulator valve isremote from the valve controls for the open burners which prevents easyaccessibility, es-

lation is the large pecially, when the thermostat therefor is locatednear the rear of the oven, as is desirable from the standpoint ofmaximum oven space. 3

Another disadvantage of this type of instalamount of pipingnecessary theoven burner by way of It is, therefore, one of the objects of myinvention to provide, in a gas stove of the type referred to, aregulator valve for automatically controlling the oven burner supply,which is located adjacentthe control valves for the other burners and isthe thermostat within the rear to supply fuel to the regulator valve.

regulated by of the oven.

Another object of my invention is to provalve and the thermostat whichwill permit the latter to accurately control the valve in accordancewith the oven temperature regar less of the heat to which the connectingmeans may be subjected.

Still another object of my invention is to provide on a table top orconsole type gas stove, a regulator valve that is easily accessible,neat in appearance, and requires a minimum amount of fuel supply piping.

Other objects will become apparent from to automatic oven the followingdescription taken in connection with the drawings showing a preferredembodiment of my invention.

In the drawings Figure 1 is a front view of a table top type of gasstove disclosing my invention in relation to the open burners and theoven; Figure 2 is a top view of Figure 1 with the cover removed and theoven in cross section; Figure 3 is a top view, partly in section, of theconnection between valve and the thermostat; and Figure 4 is a sideview, partly in section, of the regulator valve and part of theconnection with the thermostat.

In the embodiment of my invention illustrated by Figures 1 to 4 of thedrawings, 1 indicates a gas stove of the table top type which iscomposed of an oven having a broiler section 2 and a top section 3, andan open burner section 4 lying in the/ same plane as the top of the topsection. A fuel supply pipe 5 extends into the side of the open burnersection and is connected to the manifold 6 The exposed burners 7 areconnected to the manifold through suitable valves 8 in a well knownmanner. fuel supply pipe- 9 is connected through a manual valve 10, withthe regulating valve 11 arranged'at the front of the open burnersection, which latter valve automatically controls the flow of gasto'the oven burner 12 connected to the regulating valve by pipe 13.Situated in the rear of the oven section 3 near the top thereof is athermostat 14 held in place by a suitable clip and extending through theoven walls 15 and 16 into the rear part of the open burner section 4 andconnected to control the valve 11 by suitable mechanism broadlyindicated by the numeral 17 and to be later referred to indetail.

Itis thus seen that by this arrangement 0 the regulator valve andthermostat that a minimum amount of fuel pipe is used to connect theregulator valve and the oven burner with the manifold. It is also to benoted that the arrangement places the regulator valve adjacent thevalves controlling the exposed burners, which is very desirable from thestandpoint of accessibility. Also, by placing the thermostat in the toprear portion of the the regulator ion oven section 3, it is free frombeing constantly tion tube 41 is of the well known ty e and hit andbattered by the insertion of cooking extends to the outside of the ovenan is seutensils into the oven. cured at its outer end to the L-shapedcasing f in some of the table top or console type and is closed at itsinner end by means of a 5 stoves there is sufiicient space between thescrew ca 42held in place by the lock nut 43. oven and the adjacentexposed burners 7, the En close within the part of the tube lying foldadjacent the si e of the oven. at one end agalnst the screw cap 42 andhaveferring to Figures 3 and 4, the regulating ing its otherend inengagement with 10 valve, the thermostat, and the connections which inturn engages a short rod 46 extend- 7 therebetween will bedescribedindetail. The ing into the central chamber 47' of the L-regulatlng valve 11 is com osed of a casing shaped casing. 18 rovidedwith an inlet 0 amber 19 and an A T-shaped lever 48 is ivoted atits baseout at chamber 20. Theinlet chamber is in within the chamber 47 andas'one of its arms 5 communication with the su ply pipe 9 from v inengagement with the adjacent end of short 80 the manifold by means of atting 21 attached rod 46 and its other arm in engagement with to thevalve casing. This fittin also conthe end of a short rod 49 slidable inthe part of nects the outlet chamber to t e pipe 13 L-sha ed casing towhich the tube 37 is conleading to the burners. The usual adjustablenecte Interposed between the short rod 49 by-pass 22 in the fittingsupplies a minimum and the valve stem and lying within the tube 86amount of gas from the pipe 9 to the pipe 13 37 is a rod completing theconnection beto assure a supply of gas to the burner 12 if tween thethermostatic tube and the valve. the valve is closed. A disc valve 23 isen- An opening 51 in the L-shaped casing closed closed in the casing 18and is rovided with by a plug 52 provides for assembly of the rods 2 aseat 24, between the inlet-an outlet charm and the T-lever and a bracket53 secured to bers, for regulating the flow of gas therebethe back ofthe section 4 of the stove afi'ords tween. A valve stem 25 isscrew-threaded a convenient support for the L-shaped casing. within thecentral portion of the valve and Since the spring 31 is normally tendingto the valve is provided at its outer surface with hold the valve 23onits seat, the end of the 30 an integral rectan ular ortion 26. carbonrod 44will beheld in engagement wlth A i g g p 2 is t a d y secured tothe cap 42 of thermostatic tube 41 by means the valve casm 18 and has acentral opening of the valve stem, the rod 50, short rod 49, 28therethroug in alignment with the valve Tr-lever 48, short rod'46, androd 45, and stem in which is rotatably mounted a setting there will beno lost motion in the entire conmember 29 provided with a rece s 3 adapd nection. When the oven is cold the thermo- 190 to receive the integralportion 26 o the static tube 41 will becontracted and the valve valve. Asuitable valve spring 31 is n will be unseated' to allow gas to flow tothe posed between the setting member nd h burner 12, the maximum openingof the valve valve 23 normally tending to maintain the being determinedby the ad ustment, by

40 valve on its seat. A knob 32 is connected to means of the manualsetting member, of the the outside of the setting member by means ofposition of the valve on the valve stem. When a set screw 32', therebyproviding a conventhe burner has been li hted and the oven is ient meansfor adjusting the valve stem. heated the thermostatic tube 41 will beex- Fixed to the valve casing is a second cap anded, therebyincreasing'its len h. The

vmember 33 spaced from the cap 27 and proength of the carbon rod islittle a ected by vided with an arcuate opening 34 and approthe heatand, therefore, the carbon rod will priate indicia adjacent thereto. Anindicatbe moved in the thermostatic tube by the acing member 35 liesbetweenthe two ca memtion of the valve spring 31 acting through the bers27 and 33 and is rotatably secure to the valve stem, connecting rods andT-lever',

59 setting member 29. Part of the surface of the thereby closing ortending to close the valve.

ndicating member adjacent the scale open- The entire mechanism is soadjusted before mg 34 is provided with an arcuate colored installationthat when the temperature of the portion 33 to simulate a thermometer,ne oven reaches the value for which the setting end of whlch cooperateswlththe mdicia admember has been manually adjusted, the ex- 34150 In ithe Settmg pansion of the thermostatic tube will have f h m m erpermitted the valve to close to a suflicient exe valve cas1ng18 ad acentthe inner end tent to revent further increase of temperaof the valvestemhas an opening 36 therein ture. ny drop in temperature in the oven 60across the section 4 between the exposed and the valve to open wider bythe action of urners 7 A nut 38 securely locks the tube t e connectionsagainst the valve stem. It to the casing. The end of the tube adjacentis, therefore, seen that by means of the therthe back of the section 4is flared and secured mostatically regulated valve, the fuel supto anL-shaped casing 39 by means of a nut 40. plied to th burner is alwayssuch as to main- The t ermostat1c expansion and contractain thetemperature of the oven at the value 139 made to prevent this heat frominterfering with the accuracy of regulation. I accomplish this byconstructing the moving elements of the connecting means between thethermostat and valve ofmaterials having the same coefficient ofexpansion as the parts which enclose them. Thus tube 37 and rod 50 areof the same material such as copper; casing 39 and the parts 46, 49 and48 are the same material such as brass; and rod is of the same materialas the tube 41 of the thermostat.

Having fully described my invention, what I claim as new and desire tosecure by etters Patent of the United States is:

1. In a stove'having an oven and open burners located laterally of theoven, a thermostat positioned at the rear of the oven, a valve casingpositioned laterally of the front of the oven and provided with a valvecontrolling the fuel sup ly to the oven, and means connecting the termostat to the valve, said means comprising a tube rigidly connected tothe valve casing and a rod within the tube to transmit movement of thethermostat to the valve.

2. In a stove having an oven and open burners located laterally of theoven, a thermostat in the rear of the oven, a valve casing positionedlaterally of the front of the oven and provided with a valve controllingthe fuel supply to the oven, and means connecting the thermostat to thevalve, said means comprising a tube rigidly connecte to the valve casingand a rod within the tube to transmit movement of the thermostat to thevalve, said tube being exposed to the heat of an open burner when thelatter is in operation and being of material having the same coeificientof expansion as the rod.

3. In a stove having an oven and open burners located laterally of theoven, a thermostat positioned at the rear of the oven, a valve casingpositioned laterally of the front of the oven and provided with a valvecontrolling the fuel supply to the oven and means connecting thethermostat to the valve, said means comprising a tube rigidly connectedto the valve casing, a casing located adjacent the rear of the oven andconnecting said tube to said thermostat, a rod in sai tube connected tosaid valve, and means in said casing for transmitting movement 0 saidthermostat to said rod.

4:. In a stove having an oven and open burners located laterally of andsubstantially in the plane of the top of the interior of the 5 ling thefront of d mostatic tubewith the oven, a thermostat in the rear of theoven, a valve casing positioned laterally of the front of the oven andprovided with a valve controlling the fue supply to the oven, and meansconnecting the thermostat to the valve, said means comprising a tuberigidly connected to the valve casing and a rod within the tube totransmit movement of the thermostat to the valve, said tube beingexposed to the heat of an open burner when the latter is in operationand being of material having the same coefiicient of expansion as therod.

5. In a stove havin an oven and 0 en burners located lateral y of theoven, a uel manifold in front of the open burners, a valve casingpositioned adjacent the fuel manifold and provided with a valvecontrolfuel supply to the oven, a thermostat in the rear of the oven andmeans exterior of the oven for connecting the thermostat to the valve.

6. In a stove having an oven and 0 en burners located laterally of theoven, a uel manifold in front of the open burners, a valve casingpositioned adjacent the fuel manifold and provided with a valvecontrolling the fuel supply to the oven, a thermostat in the rear of theoven, and means connecting the thermostat to the valve, said meanscomprising a tube rigidly connected to the valve casing and a rod withinthe tube to transmit movement of the thermostat to the valve.

7 In a stove having an oven and open burners located in a section of thestove situated laterally of the oven, a manifold and manual valves infront of the burners, said valves controlling the fuel supply from saidmanifold to the open burners, a valve casing positioned adjacent themanual valves and provided with avalve controlling the fuel supply ofthe oven, a thermostat located in the rear of the oven and extendinginto the open burner section, and means for connecting the thermostat tothe valve.

8. In a stove having an oven and a burner therefor, a valve casingpositioned at the the stove and provided with a valve controlling thefuel supply to the oven burner, a casing at the rear of the stove, athermostat comprising a tube rigidly connected to said casing andextending into the oven and a rod in said tube having a diflerentcoefficient of expansion from said tube, a tube rigidly connected to thevalve casing and to the casing at the rear of the stove, a rod in saidlast named tube operatively connected to the valve and means in saidcasing for operatively connecting the rod in the therrod in the lastnamed tube and the tube contube, the thermostatic being at an anglenected to the valve casing to each other.

9. In apparatus of the class described, the combination with a gasstove, of an oven therefor, open burners adjacent the oven and wlthinthe tube with the th signature, this 19th day of plate as the topportion of manifold adjacent the front of said 0 en burners, a burnerfor the oven connecte to the manifold, a valve at the front of said openburners for controlling the el supplied to the oven burner, a valvestem, a thermostat in the rear of the interior of t e oven and extendingat an angle to the axis on said valve stem, and means for transmitti'n'gmovement of said thermostat to said valve stem to control the valve.

10. In apparatus of theclass described, the combination with a gasstove, of an oven ogen burners adjacent the oven and plane as the top ofthe oven, a burner for the oven, front of the open burners forcontrolling the fuel to th burner a valve casing, a thermostat in therear .of the interior of the oven, means exposed to the heat of the openburners for transmitting movement of said thermostat to said valve, saidmeans comprising a tube secured to the valve and connected ermostat, arod-operatively engaging the, valve, and means for transmittinmotionfrom the thermostat to the rod, sai rod and tube being composed ofmateri- :11 having the same coefiic-ient of expansion.

11. In a stove having an oven and open burners, a valve casingpositioned at the front of th d provided with a valve controlling thefuel supply to the. oven, a thermostat in the oven,'and means connectingthe thermostat to the valve, said means comprising a casing at thenrearof the stove, a tube rigidly connected to the valve casing and to t ecasing at the rear of the stove and a rod to transmit movement of the termostat to the valve, said tube being exposed to the heat of an openburner and being of material having the same coeflicient of expansion asthe rod.

In testimony whereof, I

lying in the same said oven, a fuel hereunto aflix my Au st, 1931.SAMUEL BAKER.

a valve at the

